Two-time combustion-engine.



No. 871,380. PATBNTBD NOV. 19, 1907.

E. TUCKERMANN.

TWO TIME COMBUSTION ENGINE. APPLICATION FILED AUG.17.1906.

2 sums-811E212.

l at Ruth, near Dusseldorf, Germany, have in cycle explosive engine, and Fig. 2 e similar tor cylinder 7), is provided EltllSi 'l KIKERMANY, OF BATH, NEAR DUSSELDORF. GERMANY.

FEYJO-TIIMZE COMBUSTION-E NGINE No. 871,880. Specification of Letters Patent. Patented Nov. 19, 1907 Application filed 17.1906. SerielNo. 330,944.

of the gas engine contains piston 0, and is fun ther provided with the usual exhaust ports a.

The operation of the gas engine 18 as tol- '0 all will it me 5 concern:

Be it linown that l, Enxsr TUCKER'MANN, SUlJjQCt of the German Emperor, residing vented new and useful ln'iprovenumts in 'lwmTime (.ombuslimvEngines, of which the following is e specification.

This invention relates to ii two-cycle gas engine, which is so ijsonstructed that the waste gases are eil'ectiveiy expelled before be new chargeis admitted to the cylinder. Forthis purpose separate means are pro ided for supplying the scavenging air and the charge air in such a manner, that the former admitted at low pressure, while the latter is wilmitted at high pressurize. Owing to the low pressure of the cleaning sir, all 1 whirling oi the waste gases is avoided, thus reducing the required quantity of cleaning air to 1*.- minimum.

in the eccom mnying drewings: Figure l is longitudinal section of my improved twopzirts are in the position shown in. Fig. 1, i. piston o, is in its right hand terminal position, after an explosion hes token place. In order to admit the scavenging air, left hand valve f, is raised by suitable means, (no shown), to close chamber y, egninst chamber a, and valve o, is opened to establish oominunicntion between chamber a, and cylinder Piston Z, will now start on its trave towards the right, thereby causing port of the air contained in cy inder 7), to flow through openings Zr, pipe Z, duct Z and chamber a, into cylinder 1). Openings 7r, should be so dimensioned that the scavenging air is admitted into cylinder 1), during the motion of piston Z, with a small but continuously inc easing pressure. After piston t, has covered openings the inflow of the scavenging air into cylinder 6, will cease, as the further forward movement will press the nihtlirough pipe 7L3, intotlie mixing chamber As the piston 1, ot' the gas pump par-. ticipntcs in the movement o't piston Z, a qunntity of gas contained in cylinder 1), corresponding to the unntity of the scavenging air discharged from cylinder p, is returned into supply pipe 3), through return pipe 7) After piston g, has covered openings n, the will llow through pipe "i", into the mixing olu'unl'ier y. in this way :i unitorn'i composition of the explosive charge insured. After valve f, has been opened by suitablemenns, (not shown), the mixture will enter cylinder h, whereupon compression, explosion and discharge of the waste gases will lekeplace, as usual with two cycle gas engines.

The above described operntionhvill be repeated on the other side of working piston 0, us pumps 7'), and p, are double acting.

By altering the size of openings 12', end by cluinging the mechanism for operating the inlet ynlvesthe relation between scavenging air an :1 charge air may be adjusted.

It is obvious that the construction oi :rny

section through modification thereof.

The letter p. denotes the cylinder of en nir/ pump which conteins piston Z. i t its conwith n series oi circunitorentiel opening r, which, by pipes Z, P, and ducts Z. i, coznn'iunicete with it pair of annular scavenging :iir chnmbers The letter are adopted to communicate with the cylinder 3', of the giis engine, by openings 5, controlled val L lindcr 7), receives its clia rge through :3 pair of pipes p entering t-hc cyliiider DIEM its ends and controlled by check ml 3. fidjoini g cylinder p, there are :urnn; l e [)T i of eir cl iui'nbers h, 71-, conmiun' ion between such LllllllbQ'lS and cylinder p. controlled by outwardly opei'iing clinch-valves d. (lhomber it, communicates \iith chamber 7:", by pipe l'r'", while cl uber ll, is eminecied to mixing ol'iumher 'y, by pipe h mid mixing duct 3 Cylinder p. of the pump contains piston g. which is secured to piston rod 9, which also curries piston 1. Cylinder p, is provided with central row of circumferential openings 71, comnmnienting by pipe 7), with one of the gas supply pines p. A pair oi chambers 'i, a ranger at both endsot cylimproved gus engine may be changed withinrlor p", r by pi I ed to duct :4. out departing from the spirit of my imfenin the hit gas :1 .4 air are on. v moons iron, so for instance, the notion ol t.lie-nir of thus 7: that receive rotnrjy mph. 1 on may be reversed, so that during the suitable muri ltletn een cl'n'u'iihors r. em first part of its stroke, cl'ui-rge nil is admitted y, there is interposed a. val e l ilyliinler i to the engine, while during the letter port of lows: it may be assumed that the different substantially as specified.

chamber y, of" Fig. 1, is dispensed with, while separate pipes i I, 2, I, lead .from the air pump and gas pumprespectively, to the gas engine.

1 claim:

wit h means for delivering low-pressure si'jwavenging air from the pump to the working cylinder during the inilial part of the pump piston stroke, and means for delivering charge an from the pump to the \vuilqng cylinder during the final part of said stroke,

in a two cycle explosive engine, a working eylin'iler, n sezuenging air chamber and a mixing chamber, combined with an air pumpsepzu'ute from the working cylinder ztllll hav- 'neeting said openings withthe scavenging air chamber, and means for connecting the pump cylinder ends with the mixing chamber, substantially as specified.

3. In a two-cycle explosive engine, a scavengine air chamber and a mixing chamber, col'nbined with an air pump cylinder having peripheral air openings, a gas pump cylinder 1 In a two cycle explosive engine, a workmg cylinder, an air pump separate therefrom. and a piston within said pump, combined having peripheral gas openings and a gas supply pipe. means for connecting the air opening: with a scavenging air chamber, means for connecting the gas Openings Witl the gas supply pipe, and means forconnectingthe ends of the air and gas cylinders with thel mixingchamber, substantially asspecifie:

Signed by me .at Dusseldorf, Germany,

this twenty-seventh day of July 1906.

ERNST T QCKERHANN "fit nesses:

WIILIJAM ESSEAWVBIX, ALi-nnn PonLMEiERj 

